The history of all hitherto existing society is the history of class struggles.

"To love is to risk not being loved in return. To hope is to risk pain. To try is to risk failure, but risk must be taken because the greatest hazard in life is to risk nothing."

通信技术的创新应聚焦于解决现实问题。

婴儿的哭声与其听起来一样严重。

唱歌最重要的是真诚，技巧只是辅助。